Fuel pump



, ignition coil,

Patented Feb. 16, 1932 UNITED STATES PATENT orncr.

IBED G. SCHWEIBT EAL, OF CHICAGO, ILLINOIS, ASSIGNOB TO srnwm'r-wnnmO03- POBATION', OF CHICAGO,

FUEL

ILLINOIS, A CORPORATION OF VIRGINIA ruin Application fled larch 31,1930. Serial 80.440375.

The purpose of this invention is to provide an improved and economicallyconstructable device for pumping fuel to the carbureter of a motorvehicle engine from the main fuel supply tank located at a lower levelthan the carbureter, utilizing for that purpose the engine ignitioncircuit and specifically the ignition coil unit in which theinterruptions of the circuit alternately energizing and deenergizing themagnetic'core, adapts the latter to constitute means for producingvibration or pulsation of a motor which may thereby become a pumpingelement by associat1on with suitable valves and conduits. The inventionconsists in the elements and features of construction shown anddescribed as indicated in the claims.

In the drawings v Figure 1 is a diagrammatic view for showing in theirrelative positions on the vehicle the main ifuel supply tank, thecarburetor and the pumping device of this invention.

Figure 2 is a vertical axial section of the ignition coil unit and thepump casing upon which it is mounted, the connection of the pump casingwith the fuel source and the engine carbureter float bowl beingindicated diagrammatically.

Figure 3 is a top plan view of the construction shown in Figure 2.

Figure 4 is a wiring diagram of the construction shown in Figure 2. r

In the structure as illustrated in the drawings, A represents the mainfuel supply tank at a lower level than the carbureter which is shown atB. The ignition coil unit is indicated in totality by referencecharacter, C, said entire unit being commonly called the V and beinghereinafter re ferred to by that term. Referring to Figure 2, theignition coil unit is shown comprising a casing, 20, having a magneticelement consisting of a central pole member, 30, which constitutes thesolenoid core, en-

" compassed by the primary and secondary windings indicated at 40 and41, with the usual paper insulation, 31!, said ma the outer 'po erespectively, indicated at etic element compri 'ng also member, 31,which embraces the solenoid windings,said outerpole member beingextended beyond the solenoid windings and beyond the plane of the end ofthe central core pole member, protrudes from .the windings; and saidouter pole member is furnished with an annular- 32, which may bereferred to also pole piece,

as a flux ring, having its central aperture which also in alignment w1ththe solenoid core pole member, 30. This central aperture of the fluxring is of suitable diameter to admit an armature indicated at 50,without contact with said flux ring, 32. a 1,

The pump body mounted upon or having mounted upon it the ignition coilunit, as

mentioned, comprises a mam casing member,

51, containing the pumping chamber, 55, having inflow and outflowconnections herein after mentioned, having an aperture, 51, in its u perside through which {the umpmg member, hereinafter more pa ticu arlydescribed, is admitted, said apert re being pro-" vided with a closureplate, 52. The casing member, 51, is recessed, as seen at 54, op ositethe aperture which is closed by the c osure member, 52, to form thepumping chamber. The casing member, 51, is formed with "an inflow duct,56, leading into ,the pumping chamber at the right hand side(referringto Figure 2) and the outflow discharge duct 57, leading fromthe opposite side of sai pumping chamber. The inflow duct, 56, leadsfrom an intake port, 59, at which there is provided an intake valve, 60;and the discharge port, 62, at which there is rovlded a dischar e valve,63, said intake an discharge valves ing of customary constructionarranged for inflow and outflow respectively, and seating againstreverse flow, and being held normally thus seated by the springs, 64:and 65, respectively.

The drawings indicate that the fuelarrives at the pump by way of a pipeconnection indicated at 67 at the right hand and of the pump casing andthrough which it is delivered into. a fuel and sediment trap indi catedat M, from which, upon the trap being filled-to the inlet of the intakevalve seating ,bushing, 68, it is withdrawn by the suction into thepumping chamber, 55. The drawings further indicate that there isprovided on the discharge line beyond the dischar e valve, 63, apressure trapping chamber,

the provision of the fuel and sediment trap andpressure trap, M, N,respectively, and the relation of these features to the remainder of thepump construction, are not part of the present invention which is,however, adapted to be embodied in a construction having such features,as shown in the drawings.

The pumping member in the pumping apparatus as shown consists of aflexibly expansible and reducible chambered member indicated in totalityat 70, which numeral specifically denotes also its interior cavity, saidmember being formed by a pair of concentrically corrugated disks, 71 and72, clinched together and sealed at their periphery for enclosing achamber between them.

In the construction shown the upper corrugated disk, 71, has a centralaperture at whose margin said disk is made fast and sealed by means ofan open nipple, 71, to a correspondingl centrally aperture andcorrugated disk, 73, which spans the central aperture, 51, of the umpcasing, said disk, 73, being dished con ming to the form of the underside of the closure plate, 52, intruding into the central aperture, 51,and having a marginal flange, 73, said disk being clamped by saidmarginal flange between the pump casing and its closure member, 52; andthe latter has a central aperture, 52, at which the movable armaturemember, 50, is mounted by means of a stem, 50, which 1 extends downthrough the re istered central apertures of the disks, 71 and 3, and ismade fast at its lower end to the lower disk, 72, of the pumpingdiaphragm structure to which said stem is clamped by inner and outerclamping nuts, 75 and 76.

As shown, and as a matter of convenience for assembling the parts, theannular pole piece, 32, is mounted in proper position both with respectto the pump casing and with respect to the fixed core of the solenoid bybeing lodged upon the upper ends of an upwardly protruding annularflange, 52, of the closure member, 52, and upwardly protruding bosses,52, to the latter of which said pole piece is secured by screws, 32; andbeing thus secured, said pole piece serves for stopping the upper end ofa spring, 75, which reacts at its lower end on. an upwardly facingshoulder of a flange, 50", formed at the lower end of the movablearmature, 50, said spring thus op-- erating for holding the armaturenormally withdrawn from the central core member, 30, against themagnetic attraction of the latter when the solenoid is energized.

, The operation of the construction as above 7 described may beunderstood from the foregoing description to be that when the ignitioncoil windings are energized the armature, 50,

is' attracted to. the core member, 30; and uponthe interruption ofthecircuit it is retracted protrudingly by the reaction of the spring, 7 5,the alternate attracted and retracted movement of the armature operatingrespectively for reducing and expanding the pumping member, 7 0, thereduction of said member operating for increasing the fluidra'pacity ofthe pumping chamber and thereby operating for suction to draw in thefuel supply past the intake valve, 60, and the enlarging of the pumpingmember operating for reducing the fluid ca acity of the pumping chamberand causing ischarge of fuel past the outlet valve, 63.

I claim: a

1. A pumping ap aratus comprising in combination a solenoid structure, apump casing on which the solenoid structure is mounted, said pump casinghaving a pumping chamber, a pumplng member in said chamber armature inposition for being encompassed by said pole member and reciprocatingtherein. 4

2. A pumping apparatus comprising in combination a solenoid, a umpcasing on which the solenoid is mounte having a pump-,

ing chamber, a pumping member in said chamber arranged to be actuatedfor enlar ing and reducing the fluid capacity oft e chamber, thesolenoid outer ole being extended beyond the plane of tli e central poleand furnishedwith'an annular pole p ece, and an armature carried by thepumping member mounted normally protruding through the central apertureof said pole piece and reciprocating therein in the pumpmg movement ofsaid pumping member.

3. A solenoid structure having a magnetic core constituting one pole ofthe magnet with an opposite pole conslstin of a member embracing thesolenoid windmgs and extendin ast the plane of the centra core pole andrnished with an annular-pole piece having its central aperture inalignment with the core pole a pump casin on which said solenoidstructure is mounte pumping chamber with a pumping mem r thereinarranged to be actuated for enlarging and reducing the fluid ca acity ofthe changber; an armature carrie by said pumping member for ada tin itto respond'to magnetic attraction y c amber-capacity-changhavin aingmovement, said pumping member being positioned with respect to thesolenoid struc-- ture for pumping movement toward and from the solenoidcore pole, and armature being dimensioned and r 1- extending through theannular pole iece and reciprocating therein toward an from the corepole, and a spring reacting on the armature and pumping member inopposition to the malgnetic attraction of the solenoid magnet p0 es.

4. A pumpin ap aratus comprising in combination a so enoi structure; apump casing on which said solenoid structure is mounted, said casinghaving a pumpin chamber; a pumping member in said eham r arrangedto beactuated for enlarging and reducing the fluid ca acity of the chamber,the magnet element 0 the solenoid structure having a pole memberterminating roximate to the pum ing chamber; a mova 1e armature carr edy the pumping member in position exposed outside the pumping chambertoward and proximate to a fixed pole of the magnet element of thesolenoid structure, the pumping member being arranged for movement inchamber enlarging direction by the movement of the armature underattraction of the magnet element when the solenoid is energized, and thespring reacting on the armature for reverse movementwhereby the intakestroke of the pump is'aiiected by the magnetic attraction, and thedischarge stroke is hmited by the reaction of the spring.

5. In the construction defined in claim 4, the pumping member being aflexibly expansible and reducible chambered member, so that itsexpansion reduces and its reduction enlarges the fluid capacity of thepumping chamber,

said pumping member being mounted in the pumping chamber b its wall atthe side toward the magnet po e of the solenoid structure, and thearmature being carried by the opposite wall, the first mentioned wallhava ing an aperture and the armature a stem extending through theaperture or reaching and securement to said opposite wall of the pumpingmember.

6. The construction defined in claim I hav- 5 ing the pumping memberconsisting of a flexibly expansib e and reducible chambered memberhaving a nippleby which it is mounted at one side wall of the pumpinchamber with said nipple affording atmosp eric communim cation forventin the cavit of said member, the armature being carrie by therzsposite side wall of said expansible and ucible chamber.

In testimony whereof, I have hereunto set m hand at Chicago,Illinois,this 17th day of arch, 1930.

FRED G. SCHWEISTHAL. v

